Rose, my guess about the dizziness is that it is MS related. My Neuro has told me that the lesion I have at the base of my skull is the largest one I have and the most problematic for me in my disease. I have some more very small ones at the top of my brain, but he says from my walking disability to dizziness and other things he thinks that one is the culprit. Also, when I saw another MS specialist who had has own MRIs done he showed me the film and pointed out that one as the worst one as far as problems. He told me I might have some problems from the ones in the top of my brain, but not what I am having now.